Global Patent Index - EP 1048696 A2

EP 1048696 A2 2000-11-02 - Method for preparation of hydrophobic precipitated silica

Title (en)

Method for preparation of hydrophobic precipitated silica

Title (de)

Verfahren zur Herstellung hydrophober gefällter Kieselsäure

Title (fr)

Procédé de préparation de silice de précipitation hydrophobe

Publication

EP 1048696 A2 (EN)

Application

EP 00303304 A

Priority

US 29986399 A

Abstract (en)

A method for the preparation of hydrophobic precipitated silica. The method comprises contacting an aqueous suspension of a hydrophilic precipitated silica with (1) a catalytic amount of an acid and (2) an organosilicon compound in the presence of (3) a water-miscible organic solvent in an amount sufficient to facilitate reaction of the hydrophilic precipitated silica with the organosilicon compound to form a hydrophobic precipitated silica.

IPC 1-7 (main, further and additional classification)

C09C 1/30; C01B 33/193; C09C 3/12

IPC 8 full level (invention and additional information)

C01B 33/18 (2006.01); C01B 33/193 (2006.01); C09C 1/30 (2006.01)

CPC (invention and additional information)

C09C 1/3081 (2013.01); C01B 33/193 (2013.01); C01P 2006/12 (2013.01); C01P 2006/90 (2013.01)

Designated contracting state (EPC)

DE FR GB

DOCDB simple family

EP 1048696 A2 20001102; EP 1048696 A3 20010207; EP 1048696 B1 20041215; DE 60016661 D1 20050120; DE 60016661 T2 20051006; JP 2000327321 A 20001128; US 6184408 B1 20010206